Abstract
Hydroxyapatite (HA) having chemical formula Ca10(PO4)6(OH)2, is the main chemical component of human bone tissue (70%). This is the reason why it has been widely engaged in the dental and non-load bearing implantations, to cope up with the bone response as a bioactive material. In this study HA powder was synthesized by wet chemical method, using phosphoric acid (H3PO4) and eggshells. The synthesized HA powder was characterized by X-ray diffraction analysis, Scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDX) and Fourier transform (FT-IR) spectroscopy. The Thermos gravimetric analysis (TGA-DTA) was also carried out to evaluate the stability of the synthesized HA powder at higher temperatures. The results of the study indicate that sintered (at 900°C) HA powder resembles the feature of pure and single apatite phase having favourable Ca/P ratio ranging from 1.7 to 2.4.
Highlights
Hydroxyapatite (HA) is the most resourceful inorganic biomaterial used for biomedical application [1]
The experimental procedure is divided into three parts which deals with preparation of CaO from egg shell, synthesis of HA powder from CaO and phosphoric acid, and characterization of HA powder
The elemental analysis of the HA was conducted by the same FE-Scanning electron microscopy (SEM) instrument equipped with energy dispersive X-ray spectroscopy (EDX) system
Summary
Hydroxyapatite (HA) is the most resourceful inorganic biomaterial used for biomedical application [1] It is a naturally occur mineral of calcium phosphate in the apatite family (A10(BO4)X2) and regularly written as Ca10(PO4)6(OH)2) [2]. Hydroxyapatite is highly bioactive and biocompatible with human organs It has acknowledged a great consideration in the field of biomedical science due to its ability to form chemical bonds with hard tissue [7]. In this study an attempt has been made to use this waste eggshell as a calcium source for synthesizing highly pure and nanocrystalline HA powder. The synthesized HA powder was characterized using XRD, TG-DTA, SEM and FTIR
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